MAP-21 National Highway System
MAP-21 (Moving Ahead for Progress in the 21st Century)
On October 1, 2012, Section 1104 of MAP-21 expanded the existing National Highway System (NHS) to include all Principal Arterials (i.e. Functional Classifications 1,2 and 3) to the NHS.
Per MAP-21, the NHS is composed of approximately 160,000 miles of rural and urban roads nationwide serving major population centers, international border crossings, intermodal transportation facilities, and major travel destinations. The NHS includes the following:
- The Interstate System.
- All principal arterials (including those not previously designated as part of the NHS) and border crossings on those routes.
- Intermodal connectors -- highways that provide motor vehicle access between the NHS and major intermodal transportation facilities
- STRAHNET (Strategic Highway Network) -- the network of highways important to U.S. strategic defense
- STRAHNET connectors to major military installations.
FHWA q & a's
Federal Highway Administration questions and answers regarding the NHS following implementation of MAP-21:
To view a map of the NHS, go to Caltrans Earth, then on the left column click "Highways", then "Map-21 NHS.".
NHS ADDITIONS or DELETIONS
- For further information on how to add or remove a route from the NHS, CLICK HERE.
- For a flowchart summary of the process, CLICK HERE.
- Navneet Singh (Branch Chief) at (916) 654-6585 or email@example.com.
- Rose Cuellar (Staff) at (916) 654-2927 or firstname.lastname@example.org.
Page Updated on July 25, 2014